Signaline Retractable Cable
Extendible cable for flooting roof tank connections
Linear Heat Detection is a fast and efficient way to detect overheating gasses exiting the rim seal of storage tanks.
The rim seal linear heat detection loop is fixed to the moving ‘floating roof’ that will lift and fall as the tank contents are used and refilled. To ensure a secure connection between the fire alarm control system and the linear heat detection on the rim seal we can provide made to order Signaline Retractable cable.
The Signaline Retractable cable is installed at the top of the tank which is fixed. The retractable cable is then connected to the Signaline UCB-EX junction box located on the floating roof which will rise and fall.
The Signaline Retractable cable can be manufacured to exact site requirements. Please review the datasheet for various options for extendable lengths, end finishes and stripped cable tails.
The 4 core cable allows you to connect the the linear heat detection back to the top of the tank meaning the end of line can be located at an easily accessible level.
To reivew our full guidelines on using Linear Heat Detection for rim seal fire detection please review our application page.
Made in the UK
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Frequently asked questions
How do I test Linear Heat Detection?
Linear Heat Detection forms part of a building’s life safety equipment and therefore regular testing is essential. Functional testing can be performed by using a suitable heating element on the line-type detection cable to simulate an alarm.
Across our ranges, Signaline Linear Heat Detection can either be directly tested using a heat source or utilising internal functionality on the controllers we offer.
Which clip should I use to secure Linear Heat Detection?
For Linear Heat Detection:
The correct choice of clip depends on the specific environment, mounting surface and local regulations in which the linear heat detection is being used.
For EN54 approved solutions the cable should always be mounted with a metal fixing clip that allows a 20mm drop from the fixing surface. This allows air-flow around the line-type heat detector and ensures quick activation in an alarm event.
Specialist clips are necessary for use in specific environments, such as floating roof tanks and cable trays.
When there is no easy mounting surface e.g. due to non-flat surfaces or apexed roofs, consider the use of a catenary wire solution.
You can review a full list of Signaline Linear Heat Detection clips.
For Signaline Linear Heat Detection clips and extras:
The correct choice of clip depends on the specific environment, mounting surface and local regulations in which the linear heat detection is being used.
For EN54 approved solutions the cable should always be mounted with a metal fixing clip that allows a 20mm drop from the fixing surface. This allows air-flow around the line-type heat detector and ensures quick activation in an alarm event.
Specialist clips are necessary for use in specific environments, such as floating roof tanks and cable trays.
When there is no easy mounting surface e.g. due to non-flat surfaces or apexed roofs, consider the use of a catenary wire solution.
Can I use Linear Heat Detection in the Hazardous Area?
For electrical equipment to be used within a designated Hazardous Area the items should be certified safe for use. This is normally done by encapsulating the electronics inside a Flame Proof enclosure or ensuring the power consumption is below a minimum threshold to not be an ignition risk (Intrinsically Safe).
Many Linear Heat Detectors are defined as Simple Apparatus. This means, by themselves they do not have the electrical energy to be an ignition source.
Simple Apparatus can be used within the hazardous area, and this is the case for Signaline Linear Heat Detectors.
For more information please review our guide for hazardous areas
What is the minimum and maximum zone length for Linear Heat Detection?
The minimum and maximum zone length for Linear Heat Detection will depend on the approval of the line-type heat detector and the local regulation.
En54 part 22 approved systems are limited to 500m per zone and require a minimum of 50m.
En54 part 28 approved systems are limited to 1000m per zone and have no minimum length.
UL, cUL and FM approved systems are limited to 3000m per zone and have no minimum length.
What reel lengths are available?
Signaline Linear Heat Detection cable is sold in 50 metre lengths, so the minimum order is 50 metres.
We offer reels in 50-metre steps—such as 50m, 100m, 150m, and so on—up to 500 meters for FT-EN and HD+ cables, and up to 1000 metres for FT cables.
